/*
* jQuery UI Draggable 1.8.7
*
* Copyright 2010, AUTHORS.txt (http://jqueryui.com/about)
* Dual licensed under the MIT or GPL Version 2 licenses.
* http://jquery.org/license
*
* http://docs.jquery.com/UI/Draggables
*
* Depends:
*	jquery.ui.core.js
*	jquery.ui.mouse.js
*	jquery.ui.widget.js
*/
(function ($, undefined) {
    $.widget("ui.draggable", $.ui.mouse, {
        widgetEventPrefix: "drag",
        options: {
            addClasses: true,
            appendTo: "parent",
            axis: false,
            connectToSortable: false,
            containment: false,
            cursor: "auto",
            cursorAt: false,
            grid: false,
            handle: false,
            helper: "original",
            iframeFix: false,
            opacity: false,
            refreshPositions: false,
            revert: false,
            revertDuration: 500,
            scope: "default",
            scroll: true,
            scrollSensitivity: 20,
            scrollSpeed: 20,
            snap: false,
            snapMode: "both",
            snapTolerance: 20,
            stack: false,
            zIndex: false
        },
        _create: function () {
            if (this.options.helper == 'original' && !(/^(?:r|a|f)/).test(this.element.css("position")))
                this.element[0].style.position = 'relative';

            (this.options.addClasses && this.element.addClass("ui-draggable"));
            (this.options.disabled && this.element.addClass("ui-draggable-disabled"));

            this._mouseInit();
        },

        destroy: function () {
            if (!this.element.data('draggable')) return;
            this.element
			.removeData("draggable")
			.unbind(".draggable")
			.removeClass("ui-draggable"
				+ " ui-draggable-dragging"
				+ " ui-draggable-disabled");
            this._mouseDestroy();

            return this;
        },

        _mouseCapture: function (event) {
            var o = this.options;

            // among others, prevent a drag on a resizable-handle
            if (this.helper || o.disabled || $(event.target).is('.ui-resizable-handle'))
                return false;

            //Quit if we're not on a valid handle
            this.handle = this._getHandle(event);
            if (!this.handle)
                return false;

            return true;
        },

        _mouseStart: function (event) {
            var o = this.options;

            //Create and append the visible helper
            this.helper = this._createHelper(event);

            //Cache the helper size
            this._cacheHelperProportions();

            //If ddmanager is used for droppables, set the global draggable
            if ($.ui.ddmanager)
                $.ui.ddmanager.current = this;

            /*
            * - Position generation -
            * This block generates everything position related - it's the core of draggables.
            */

            //Cache the margins of the original element
            this._cacheMargins();

            //Store the helper's css position
            this.cssPosition = this.helper.css("position");
            this.scrollParent = this.helper.scrollParent();

            //The element's absolute position on the page minus margins
            this.offset = this.positionAbs = this.element.offset();
            this.offset = {
                top: this.offset.top - this.margins.top,
                left: this.offset.left - this.margins.left
            };

            $.extend(this.offset, {
                click: { //Where the click happened, relative to the element
                    left: event.pageX - this.offset.left,
                    top: event.pageY - this.offset.top
                },
                parent: this._getParentOffset(),
                relative: this._getRelativeOffset() //This is a relative to absolute position minus the actual position calculation - only used for relative positioned helper
            });

            //Generate the original position
            this.originalPosition = this.position = this._generatePosition(event);
            this.originalPageX = event.pageX;
            this.originalPageY = event.pageY;

            //Adjust the mouse offset relative to the helper if 'cursorAt' is supplied
            (o.cursorAt && this._adjustOffsetFromHelper(o.cursorAt));

            //Set a containment if given in the options
            if (o.containment)
                this._setContainment();

            //Trigger event + callbacks
            if (this._trigger("start", event) === false) {
                this._clear();
                return false;
            }

            //Recache the helper size
            this._cacheHelperProportions();

            //Prepare the droppable offsets
            if ($.ui.ddmanager && !o.dropBehaviour)
                $.ui.ddmanager.prepareOffsets(this, event);

            this.helper.addClass("ui-draggable-dragging");
            this._mouseDrag(event, true); //Execute the drag once - this causes the helper not to be visible before getting its correct position
            return true;
        },

        _mouseDrag: function (event, noPropagation) {
            //Compute the helpers position
            this.position = this._generatePosition(event);
            this.positionAbs = this._convertPositionTo("absolute");

            //Call plugins and callbacks and use the resulting position if something is returned
            if (!noPropagation) {
                var ui = this._uiHash();
                if (this._trigger('drag', event, ui) === false) {
                    this._mouseUp({});
                    return false;
                }
                this.position = ui.position;
            }

            if (!this.options.axis || this.options.axis != "y") this.helper[0].style.left = this.position.left + 'px';
            if (!this.options.axis || this.options.axis != "x") this.helper[0].style.top = this.position.top + 'px';
            if ($.ui.ddmanager) $.ui.ddmanager.drag(this, event);

            return false;
        },

        _mouseStop: function (event) {
            //If we are using droppables, inform the manager about the drop
            var dropped = false;
            if ($.ui.ddmanager && !this.options.dropBehaviour)
                dropped = $.ui.ddmanager.drop(this, event);

            //if a drop comes from outside (a sortable)
            if (this.dropped) {
                dropped = this.dropped;
                this.dropped = false;
            }

            //if the original element is removed, don't bother to continue
            if (!this.element[0] || !this.element[0].parentNode)
                return false;

            if ((this.options.revert == "invalid" && !dropped) || (this.options.revert == "valid" && dropped) || this.options.revert === true || ($.isFunction(this.options.revert) && this.options.revert.call(this.element, dropped))) {
                var self = this;
                $(this.helper).animate(this.originalPosition, parseInt(this.options.revertDuration, 10), function () {
                    if (self._trigger("stop", event) !== false) {
                        self._clear();
                    }
                });
            } else {
                if (this._trigger("stop", event) !== false) {
                    this._clear();
                }
            }

            return false;
        },

        cancel: function () {
            if (this.helper.is(".ui-draggable-dragging")) {
                this._mouseUp({});
            } else {
                this._clear();
            }

            return this;
        },

        _getHandle: function (event) {
            var handle = !this.options.handle || !$(this.options.handle, this.element).length ? true : false;
            $(this.options.handle, this.element)
			.find("*")
			.andSelf()
			.each(function () {
			    if (this == event.target) handle = true;
			});

            return handle;
        },

        _createHelper: function (event) {
            var o = this.options;
            var helper = $.isFunction(o.helper) ? $(o.helper.apply(this.element[0], [event])) : (o.helper == 'clone' ? this.element.clone() : this.element);

            if (!helper.parents('body').length)
                helper.appendTo((o.appendTo == 'parent' ? this.element[0].parentNode : o.appendTo));

            if (helper[0] != this.element[0] && !(/(fixed|absolute)/).test(helper.css("position")))
                helper.css("position", "absolute");

            return helper;
        },

        _adjustOffsetFromHelper: function (obj) {
            if (typeof obj == 'string') {
                obj = obj.split(' ');
            }
            if ($.isArray(obj)) {
                obj = { left: +obj[0], top: +obj[1] || 0 };
            }
            if ('left' in obj) {
                this.offset.click.left = obj.left + this.margins.left;
            }
            if ('right' in obj) {
                this.offset.click.left = this.helperProportions.width - obj.right + this.margins.left;
            }
            if ('top' in obj) {
                this.offset.click.top = obj.top + this.margins.top;
            }
            if ('bottom' in obj) {
                this.offset.click.top = this.helperProportions.height - obj.bottom + this.margins.top;
            }
        },

        _getParentOffset: function () {
            //Get the offsetParent and cache its position
            this.offsetParent = this.helper.offsetParent();
            var po = this.offsetParent.offset();

            // This is a special case where we need to modify a offset calculated on start, since the following happened:
            // 1. The position of the helper is absolute, so it's position is calculated based on the next positioned parent
            // 2. The actual offset parent is a child of the scroll parent, and the scroll parent isn't the document, which means that
            //    the scroll is included in the initial calculation of the offset of the parent, and never recalculated upon drag
            if (this.cssPosition == 'absolute' && this.scrollParent[0] != document && $.ui.contains(this.scrollParent[0], this.offsetParent[0])) {
                po.left += this.scrollParent.scrollLeft();
                po.top += this.scrollParent.scrollTop();
            }

            if ((this.offsetParent[0] == document.body) //This needs to be actually done for all browsers, since pageX/pageY includes this information
		|| (this.offsetParent[0].tagName && this.offsetParent[0].tagName.toLowerCase() == 'html' && $.browser.msie)) //Ugly IE fix
                po = { top: 0, left: 0 };

            return {
                top: po.top + (parseInt(this.offsetParent.css("borderTopWidth"), 10) || 0),
                left: po.left + (parseInt(this.offsetParent.css("borderLeftWidth"), 10) || 0)
            };
        },

        _getRelativeOffset: function () {
            if (this.cssPosition == "relative") {
                var p = this.element.position();
                return {
                    top: p.top - (parseInt(this.helper.css("top"), 10) || 0) + this.scrollParent.scrollTop(),
                    left: p.left - (parseInt(this.helper.css("left"), 10) || 0) + this.scrollParent.scrollLeft()
                };
            } else {
                return { top: 0, left: 0 };
            }
        },

        _cacheMargins: function () {
            this.margins = {
                left: (parseInt(this.element.css("marginLeft"), 10) || 0),
                top: (parseInt(this.element.css("marginTop"), 10) || 0)
            };
        },

        _cacheHelperProportions: function () {
            this.helperProportions = {
                width: this.helper.outerWidth(),
                height: this.helper.outerHeight()
            };
        },

        _setContainment: function () {
            var o = this.options;
            if (o.containment == 'parent') o.containment = this.helper[0].parentNode;
            if (o.containment == 'document' || o.containment == 'window') this.containment = [
			(o.containment == 'document' ? 0 : $(window).scrollLeft()) - this.offset.relative.left - this.offset.parent.left,
			(o.containment == 'document' ? 0 : $(window).scrollTop()) - this.offset.relative.top - this.offset.parent.top,
			(o.containment == 'document' ? 0 : $(window).scrollLeft()) + $(o.containment == 'document' ? document : window).width() - this.helperProportions.width - this.margins.left,
			(o.containment == 'document' ? 0 : $(window).scrollTop()) + ($(o.containment == 'document' ? document : window).height() || document.body.parentNode.scrollHeight) - this.helperProportions.height - this.margins.top
		];

            if (!(/^(document|window|parent)$/).test(o.containment) && o.containment.constructor != Array) {
                var ce = $(o.containment)[0]; if (!ce) return;
                var co = $(o.containment).offset();
                var over = ($(ce).css("overflow") != 'hidden');

                this.containment = [
				co.left + (parseInt($(ce).css("borderLeftWidth"), 10) || 0) + (parseInt($(ce).css("paddingLeft"), 10) || 0) - this.margins.left,
				co.top + (parseInt($(ce).css("borderTopWidth"), 10) || 0) + (parseInt($(ce).css("paddingTop"), 10) || 0) - this.margins.top,
				co.left + (over ? Math.max(ce.scrollWidth, ce.offsetWidth) : ce.offsetWidth) - (parseInt($(ce).css("borderLeftWidth"), 10) || 0) - (parseInt($(ce).css("paddingRight"), 10) || 0) - this.helperProportions.width - this.margins.left,
				co.top + (over ? Math.max(ce.scrollHeight, ce.offsetHeight) : ce.offsetHeight) - (parseInt($(ce).css("borderTopWidth"), 10) || 0) - (parseInt($(ce).css("paddingBottom"), 10) || 0) - this.helperProportions.height - this.margins.top
			];
            } else if (o.containment.constructor == Array) {
                this.containment = o.containment;
            }
        },

        _convertPositionTo: function (d, pos) {
            if (!pos) pos = this.position;
            var mod = d == "absolute" ? 1 : -1;
            var o = this.options, scroll = this.cssPosition == 'absolute' && !(this.scrollParent[0] != document && $.ui.contains(this.scrollParent[0], this.offsetParent[0])) ? this.offsetParent : this.scrollParent, scrollIsRootNode = (/(html|body)/i).test(scroll[0].tagName);

            return {
                top: (
				pos.top																	// The absolute mouse position
				+ this.offset.relative.top * mod										// Only for relative positioned nodes: Relative offset from element to offset parent
				+ this.offset.parent.top * mod											// The offsetParent's offset without borders (offset + border)
				- ($.browser.safari && $.browser.version < 526 && this.cssPosition == 'fixed' ? 0 : (this.cssPosition == 'fixed' ? -this.scrollParent.scrollTop() : (scrollIsRootNode ? 0 : scroll.scrollTop())) * mod)
			),
                left: (
				pos.left																// The absolute mouse position
				+ this.offset.relative.left * mod										// Only for relative positioned nodes: Relative offset from element to offset parent
				+ this.offset.parent.left * mod											// The offsetParent's offset without borders (offset + border)
				- ($.browser.safari && $.browser.version < 526 && this.cssPosition == 'fixed' ? 0 : (this.cssPosition == 'fixed' ? -this.scrollParent.scrollLeft() : scrollIsRootNode ? 0 : scroll.scrollLeft()) * mod)
			)
            };
        },

        _generatePosition: function (event) {
            var o = this.options, scroll = this.cssPosition == 'absolute' && !(this.scrollParent[0] != document && $.ui.contains(this.scrollParent[0], this.offsetParent[0])) ? this.offsetParent : this.scrollParent, scrollIsRootNode = (/(html|body)/i).test(scroll[0].tagName);
            var pageX = event.pageX;
            var pageY = event.pageY;

            /*
            * - Position constraining -
            * Constrain the position to a mix of grid, containment.
            */

            if (this.originalPosition) { //If we are not dragging yet, we won't check for options
                if (this.containment) {
                    if (event.pageX - this.offset.click.left < this.containment[0]) pageX = this.containment[0] + this.offset.click.left;
                    if (event.pageY - this.offset.click.top < this.containment[1]) pageY = this.containment[1] + this.offset.click.top;
                    if (event.pageX - this.offset.click.left > this.containment[2]) pageX = this.containment[2] + this.offset.click.left;
                    if (event.pageY - this.offset.click.top > this.containment[3]) pageY = this.containment[3] + this.offset.click.top;
                }

                if (o.grid) {
                    var top = this.originalPageY + Math.round((pageY - this.originalPageY) / o.grid[1]) * o.grid[1];
                    pageY = this.containment ? (!(top - this.offset.click.top < this.containment[1] || top - this.offset.click.top > this.containment[3]) ? top : (!(top - this.offset.click.top < this.containment[1]) ? top - o.grid[1] : top + o.grid[1])) : top;

                    var left = this.originalPageX + Math.round((pageX - this.originalPageX) / o.grid[0]) * o.grid[0];
                    pageX = this.containment ? (!(left - this.offset.click.left < this.containment[0] || left - this.offset.click.left > this.containment[2]) ? left : (!(left - this.offset.click.left < this.containment[0]) ? left - o.grid[0] : left + o.grid[0])) : left;
                }
            }

            return {
                top: (
				pageY																// The absolute mouse position
				- this.offset.click.top													// Click offset (relative to the element)
				- this.offset.relative.top												// Only for relative positioned nodes: Relative offset from element to offset parent
				- this.offset.parent.top												// The offsetParent's offset without borders (offset + border)
				+ ($.browser.safari && $.browser.version < 526 && this.cssPosition == 'fixed' ? 0 : (this.cssPosition == 'fixed' ? -this.scrollParent.scrollTop() : (scrollIsRootNode ? 0 : scroll.scrollTop())))
			),
                left: (
				pageX																// The absolute mouse position
				- this.offset.click.left												// Click offset (relative to the element)
				- this.offset.relative.left												// Only for relative positioned nodes: Relative offset from element to offset parent
				- this.offset.parent.left												// The offsetParent's offset without borders (offset + border)
				+ ($.browser.safari && $.browser.version < 526 && this.cssPosition == 'fixed' ? 0 : (this.cssPosition == 'fixed' ? -this.scrollParent.scrollLeft() : scrollIsRootNode ? 0 : scroll.scrollLeft()))
			)
            };
        },

        _clear: function () {
            this.helper.removeClass("ui-draggable-dragging");
            if (this.helper[0] != this.element[0] && !this.cancelHelperRemoval) this.helper.remove();
            //if($.ui.ddmanager) $.ui.ddmanager.current = null;
            this.helper = null;
            this.cancelHelperRemoval = false;
        },

        // From now on bulk stuff - mainly helpers

        _trigger: function (type, event, ui) {
            ui = ui || this._uiHash();
            $.ui.plugin.call(this, type, [event, ui]);
            if (type == "drag") this.positionAbs = this._convertPositionTo("absolute"); //The absolute position has to be recalculated after plugins
            return $.Widget.prototype._trigger.call(this, type, event, ui);
        },

        plugins: {},

        _uiHash: function (event) {
            return {
                helper: this.helper,
                position: this.position,
                originalPosition: this.originalPosition,
                offset: this.positionAbs
            };
        }
    });

    $.extend($.ui.draggable, {
        version: "1.8.7"
    });

    $.ui.plugin.add("draggable", "connectToSortable", {
        start: function (event, ui) {
            var inst = $(this).data("draggable"), o = inst.options,
			uiSortable = $.extend({}, ui, { item: inst.element });
            inst.sortables = [];
            $(o.connectToSortable).each(function () {
                var sortable = $.data(this, 'sortable');
                if (sortable && !sortable.options.disabled) {
                    inst.sortables.push({
                        instance: sortable,
                        shouldRevert: sortable.options.revert
                    });
                    sortable._refreshItems(); //Do a one-time refresh at start to refresh the containerCache
                    sortable._trigger("activate", event, uiSortable);
                }
            });
        },
        stop: function (event, ui) {
            //If we are still over the sortable, we fake the stop event of the sortable, but also remove helper
            var inst = $(this).data("draggable"),
			uiSortable = $.extend({}, ui, { item: inst.element });

            $.each(inst.sortables, function () {
                if (this.instance.isOver) {
                    this.instance.isOver = 0;

                    inst.cancelHelperRemoval = true; //Don't remove the helper in the draggable instance
                    this.instance.cancelHelperRemoval = false; //Remove it in the sortable instance (so sortable plugins like revert still work)

                    //The sortable revert is supported, and we have to set a temporary dropped variable on the draggable to support revert: 'valid/invalid'
                    if (this.shouldRevert) this.instance.options.revert = true;

                    //Trigger the stop of the sortable
                    this.instance._mouseStop(event);

                    this.instance.options.helper = this.instance.options._helper;

                    //If the helper has been the original item, restore properties in the sortable
                    if (inst.options.helper == 'original')
                        this.instance.currentItem.css({ top: 'auto', left: 'auto' });
                } else {
                    this.instance.cancelHelperRemoval = false; //Remove the helper in the sortable instance
                    this.instance._trigger("deactivate", event, uiSortable);
                }
            });
        },
        drag: function (event, ui) {
            var inst = $(this).data("draggable"), self = this;

            var checkPos = function (o) {
                var dyClick = this.offset.click.top, dxClick = this.offset.click.left;
                var helperTop = this.positionAbs.top, helperLeft = this.positionAbs.left;
                var itemHeight = o.height, itemWidth = o.width;
                var itemTop = o.top, itemLeft = o.left;

                return $.ui.isOver(helperTop + dyClick, helperLeft + dxClick, itemTop, itemLeft, itemHeight, itemWidth);
            };

            $.each(inst.sortables, function (i) {
                //Copy over some variables to allow calling the sortable's native _intersectsWith
                this.instance.positionAbs = inst.positionAbs;
                this.instance.helperProportions = inst.helperProportions;
                this.instance.offset.click = inst.offset.click;

                if (this.instance._intersectsWith(this.instance.containerCache)) {
                    //If it intersects, we use a little isOver variable and set it once, so our move-in stuff gets fired only once
                    if (!this.instance.isOver) {
                        this.instance.isOver = 1;
                        //Now we fake the start of dragging for the sortable instance,
                        //by cloning the list group item, appending it to the sortable and using it as inst.currentItem
                        //We can then fire the start event of the sortable with our passed browser event, and our own helper (so it doesn't create a new one)
                        this.instance.currentItem = $(self).clone().appendTo(this.instance.element).data("sortable-item", true);
                        this.instance.options._helper = this.instance.options.helper; //Store helper option to later restore it
                        this.instance.options.helper = function () { return ui.helper[0]; };

                        event.target = this.instance.currentItem[0];
                        this.instance._mouseCapture(event, true);
                        this.instance._mouseStart(event, true, true);

                        //Because the browser event is way off the new appended portlet, we modify a couple of variables to reflect the changes
                        this.instance.offset.click.top = inst.offset.click.top;
                        this.instance.offset.click.left = inst.offset.click.left;
                        this.instance.offset.parent.left -= inst.offset.parent.left - this.instance.offset.parent.left;
                        this.instance.offset.parent.top -= inst.offset.parent.top - this.instance.offset.parent.top;

                        inst._trigger("toSortable", event);
                        inst.dropped = this.instance.element; //draggable revert needs that
                        //hack so receive/update callbacks work (mostly)
                        inst.currentItem = inst.element;
                        this.instance.fromOutside = inst;
                    }

                    //Provided we did all the previous steps, we can fire the drag event of the sortable on every draggable drag, when it intersects with the sortable
                    if (this.instance.currentItem) this.instance._mouseDrag(event);
                } else {
                    //If it doesn't intersect with the sortable, and it intersected before,
                    //we fake the drag stop of the sortable, but make sure it doesn't remove the helper by using cancelHelperRemoval
                    if (this.instance.isOver) {
                        this.instance.isOver = 0;
                        this.instance.cancelHelperRemoval = true;

                        //Prevent reverting on this forced stop
                        this.instance.options.revert = false;

                        // The out event needs to be triggered independently
                        this.instance._trigger('out', event, this.instance._uiHash(this.instance));

                        this.instance._mouseStop(event, true);
                        this.instance.options.helper = this.instance.options._helper;

                        //Now we remove our currentItem, the list group clone again, and the placeholder, and animate the helper back to it's original size
                        this.instance.currentItem.remove();
                        if (this.instance.placeholder) this.instance.placeholder.remove();

                        inst._trigger("fromSortable", event);
                        inst.dropped = false; //draggable revert needs that
                    }
                };
            });
        }
    });

    $.ui.plugin.add("draggable", "cursor", {
        start: function (event, ui) {
            var t = $('body'), o = $(this).data('draggable').options;
            if (t.css("cursor")) o._cursor = t.css("cursor");
            t.css("cursor", o.cursor);
        },
        stop: function (event, ui) {
            var o = $(this).data('draggable').options;
            if (o._cursor) $('body').css("cursor", o._cursor);
        }
    });

    $.ui.plugin.add("draggable", "iframeFix", {
        start: function (event, ui) {
            var o = $(this).data('draggable').options;
            $(o.iframeFix === true ? "iframe" : o.iframeFix).each(function () {
                $('<div class="ui-draggable-iframeFix" style="background: #fff;"></div>')
			.css({
			    width: this.offsetWidth + "px", height: this.offsetHeight + "px",
			    position: "absolute", opacity: "0.001", zIndex: 1000
			})
			.css($(this).offset())
			.appendTo("body");
            });
        },
        stop: function (event, ui) {
            $("div.ui-draggable-iframeFix").each(function () { this.parentNode.removeChild(this); }); //Remove frame helpers
        }
    });

    $.ui.plugin.add("draggable", "opacity", {
        start: function (event, ui) {
            var t = $(ui.helper), o = $(this).data('draggable').options;
            if (t.css("opacity")) o._opacity = t.css("opacity");
            t.css('opacity', o.opacity);
        },
        stop: function (event, ui) {
            var o = $(this).data('draggable').options;
            if (o._opacity) $(ui.helper).css('opacity', o._opacity);
        }
    });

    $.ui.plugin.add("draggable", "scroll", {
        start: function (event, ui) {
            var i = $(this).data("draggable");
            if (i.scrollParent[0] != document && i.scrollParent[0].tagName != 'HTML') i.overflowOffset = i.scrollParent.offset();
        },
        drag: function (event, ui) {
            var i = $(this).data("draggable"), o = i.options, scrolled = false;

            if (i.scrollParent[0] != document && i.scrollParent[0].tagName != 'HTML') {
                if (!o.axis || o.axis != 'x') {
                    if ((i.overflowOffset.top + i.scrollParent[0].offsetHeight) - event.pageY < o.scrollSensitivity)
                        i.scrollParent[0].scrollTop = scrolled = i.scrollParent[0].scrollTop + o.scrollSpeed;
                    else if (event.pageY - i.overflowOffset.top < o.scrollSensitivity)
                        i.scrollParent[0].scrollTop = scrolled = i.scrollParent[0].scrollTop - o.scrollSpeed;
                }

                if (!o.axis || o.axis != 'y') {
                    if ((i.overflowOffset.left + i.scrollParent[0].offsetWidth) - event.pageX < o.scrollSensitivity)
                        i.scrollParent[0].scrollLeft = scrolled = i.scrollParent[0].scrollLeft + o.scrollSpeed;
                    else if (event.pageX - i.overflowOffset.left < o.scrollSensitivity)
                        i.scrollParent[0].scrollLeft = scrolled = i.scrollParent[0].scrollLeft - o.scrollSpeed;
                }
            } else {
                if (!o.axis || o.axis != 'x') {
                    if (event.pageY - $(document).scrollTop() < o.scrollSensitivity)
                        scrolled = $(document).scrollTop($(document).scrollTop() - o.scrollSpeed);
                    else if ($(window).height() - (event.pageY - $(document).scrollTop()) < o.scrollSensitivity)
                        scrolled = $(document).scrollTop($(document).scrollTop() + o.scrollSpeed);
                }

                if (!o.axis || o.axis != 'y') {
                    if (event.pageX - $(document).scrollLeft() < o.scrollSensitivity)
                        scrolled = $(document).scrollLeft($(document).scrollLeft() - o.scrollSpeed);
                    else if ($(window).width() - (event.pageX - $(document).scrollLeft()) < o.scrollSensitivity)
                        scrolled = $(document).scrollLeft($(document).scrollLeft() + o.scrollSpeed);
                }
            }

            if (scrolled !== false && $.ui.ddmanager && !o.dropBehaviour)
                $.ui.ddmanager.prepareOffsets(i, event);
        }
    });

    $.ui.plugin.add("draggable", "snap", {
        start: function (event, ui) {
            var i = $(this).data("draggable"), o = i.options;
            i.snapElements = [];

            $(o.snap.constructor != String ? (o.snap.items || ':data(draggable)') : o.snap).each(function () {
                var $t = $(this); var $o = $t.offset();
                if (this != i.element[0]) i.snapElements.push({
                    item: this,
                    width: $t.outerWidth(), height: $t.outerHeight(),
                    top: $o.top, left: $o.left
                });
            });
        },
        drag: function (event, ui) {
            var inst = $(this).data("draggable"), o = inst.options;
            var d = o.snapTolerance;

            var x1 = ui.offset.left, x2 = x1 + inst.helperProportions.width,
			y1 = ui.offset.top, y2 = y1 + inst.helperProportions.height;

            for (var i = inst.snapElements.length - 1; i >= 0; i--) {
                var l = inst.snapElements[i].left, r = l + inst.snapElements[i].width,
				t = inst.snapElements[i].top, b = t + inst.snapElements[i].height;

                //Yes, I know, this is insane ;)
                if (!((l - d < x1 && x1 < r + d && t - d < y1 && y1 < b + d) || (l - d < x1 && x1 < r + d && t - d < y2 && y2 < b + d) || (l - d < x2 && x2 < r + d && t - d < y1 && y1 < b + d) || (l - d < x2 && x2 < r + d && t - d < y2 && y2 < b + d))) {
                    if (inst.snapElements[i].snapping) (inst.options.snap.release && inst.options.snap.release.call(inst.element, event, $.extend(inst._uiHash(), { snapItem: inst.snapElements[i].item })));
                    inst.snapElements[i].snapping = false;
                    continue;
                }

                if (o.snapMode != 'inner') {
                    var ts = Math.abs(t - y2) <= d;
                    var bs = Math.abs(b - y1) <= d;
                    var ls = Math.abs(l - x2) <= d;
                    var rs = Math.abs(r - x1) <= d;
                    if (ts) ui.position.top = inst._convertPositionTo("relative", { top: t - inst.helperProportions.height, left: 0 }).top - inst.margins.top;
                    if (bs) ui.position.top = inst._convertPositionTo("relative", { top: b, left: 0 }).top - inst.margins.top;
                    if (ls) ui.position.left = inst._convertPositionTo("relative", { top: 0, left: l - inst.helperProportions.width }).left - inst.margins.left;
                    if (rs) ui.position.left = inst._convertPositionTo("relative", { top: 0, left: r }).left - inst.margins.left;
                }

                var first = (ts || bs || ls || rs);

                if (o.snapMode != 'outer') {
                    var ts = Math.abs(t - y1) <= d;
                    var bs = Math.abs(b - y2) <= d;
                    var ls = Math.abs(l - x1) <= d;
                    var rs = Math.abs(r - x2) <= d;
                    if (ts) ui.position.top = inst._convertPositionTo("relative", { top: t, left: 0 }).top - inst.margins.top;
                    if (bs) ui.position.top = inst._convertPositionTo("relative", { top: b - inst.helperProportions.height, left: 0 }).top - inst.margins.top;
                    if (ls) ui.position.left = inst._convertPositionTo("relative", { top: 0, left: l }).left - inst.margins.left;
                    if (rs) ui.position.left = inst._convertPositionTo("relative", { top: 0, left: r - inst.helperProportions.width }).left - inst.margins.left;
                }

                if (!inst.snapElements[i].snapping && (ts || bs || ls || rs || first))
                    (inst.options.snap.snap && inst.options.snap.snap.call(inst.element, event, $.extend(inst._uiHash(), { snapItem: inst.snapElements[i].item })));
                inst.snapElements[i].snapping = (ts || bs || ls || rs || first);
            };
        }
    });

    $.ui.plugin.add("draggable", "stack", {
        start: function (event, ui) {
            var o = $(this).data("draggable").options;

            var group = $.makeArray($(o.stack)).sort(function (a, b) {
                return (parseInt($(a).css("zIndex"), 10) || 0) - (parseInt($(b).css("zIndex"), 10) || 0);
            });
            if (!group.length) { return; }

            var min = parseInt(group[0].style.zIndex) || 0;
            $(group).each(function (i) {
                this.style.zIndex = min + i;
            });

            this[0].style.zIndex = min + group.length;
        }
    });

    $.ui.plugin.add("draggable", "zIndex", {
        start: function (event, ui) {
            var t = $(ui.helper), o = $(this).data("draggable").options;
            if (t.css("zIndex")) o._zIndex = t.css("zIndex");
            t.css('zIndex', o.zIndex);
        },
        stop: function (event, ui) {
            var o = $(this).data("draggable").options;
            if (o._zIndex) $(ui.helper).css('zIndex', o._zIndex);
        }
    });
})(jQuery);